Zunas’ tweet shows a photo of her colleagues on board their expedition ship, preparing for the march. Each of them holds a placard with a message: “Men for the earth”, “Save the planet”, “Seals for science” or “Penguins for peace”.

What’s your cause? What’s your thing worth fighting for? Whether it’s Star Wars or abortion, that doesn’t seem to matter, now’s the time for marching. Because so many of the things that we seem to have taken for granted are at risk of being taken away.